Knife-grinder f



(No Model.)

E. J. McQUAID. I KNIFE GRINDER FOR MOWING, REAPING AND BINDING MACHINES.

No. 434,289. Patented'Aug. 12, 1890.

WWII! I I I 1 i.

WV? 77/685 68 Inventor:

UNITED STATES EDMUND J. MCQUAID, OF DARLINGTON, PENNSYLVANIA.

KNIFE-GRINDER FOR MOWING, REAPING, AND BINDING MACHINES.

SPECIFICATION forming part of Letters Patent No. 434,289, dated August 12, 1890.

Application filed April 30, 1890- Serial No. 350,059. (No model.)

To all whom it may concern.

Be it known that I, EDMUND J. McQUAID, of Darlington, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Knife-Grinders for Mowing, Reaping, and Binding Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvementin knife-grinders for mowing, reaping, and binding machines; and it consists in the construction and arrangement of parts, which will be fully described hereinafter.

The object of my invention is to produce a grinding-machine of the construction hereinafter described, which can be applied directly to the fingers of the machine and then sharpen the cutting-knife by simply reciproeating it while in position, and thus avoid the necessity of having to remove the cutter for the purpose of sharpening it.

Figure 1 is a plan view of a grinding-machine which embodies my invention. Fig. 2 is an end view of the same. Fig. 3 is a front elevation.

A represents the finger-bar, and B the cutter, which may be of any desired construction. Ola-mped to one or more of the fingers by means of the staples C, the plates D, and the nuts E are the two end pieces G of the frame, in which all of the grinding devices are placed, and which pieces G are recessed at their rear ends, so as to receive the fingers, as shown, and have their front ends project forward and upward to form the bearings for the two rods H I.

Pivoted upon the rod II are the grinderholders J, which have their rear ends to project forward over the front edge of the cutter, and each of these holders J is provided with a dovetail recess in which the grinders L are secured by means of the set-screws N, which extend through opposite sides of the holder and thus clamp the grinder L in any desired position. By means of these setscrews and the dovetail recess in the holder J these grinders L can be adjusted back and forth into any desired position.

Secured to the rod 11 is a number of springs 0, preferably of the shape here shown, and which have their ends to catch against the upper sides of the holders J, and thus hold the grinders down against the cutter, so as to cause the grinders to sharpen it as the cutter is reciprocated while in position upon the machine. In order to increase or decrease the tension of these springs O, the rod II is provided with a handle P at one end, and by means ofwhich the rod can be turned so as to increase the pressure of the springs to any desired degree. hen it is desired to hold the grinders out of operation, the ends of the springs may be moved to one side until the holders are raised, and then the ends of the springs may be made to catch under the holders and hold them in a raised position.

Secured to the rod I by means of the setscrews Q at regulated distances apart are the frames R, which serve to keep the grinderholders in position upon the rod H and prevent them from having any lateral movement whatever. pass through their front ends, and these front ends are pronged so as to catch upon both sides of that portion of the grinder-holders J through which the rod H passes. The extreme front or outer ends of the holders J curve downward, as shown, under the adjacent ends of the holders R, and the rear ends of the holding-frames R project down below the rod I any suitable distance, and they are pronged so as to catch over oppositesides of the front ends of the grinder-holders J, so as These holders have the rod H to v to prevent them from having any lateral movement whatever. The front ends of the holders R, engaging the outer ends of the holders J, serve to limit the downward movement of the front ends of the holders J. The constant reciprocation of the cutter has a constant tendency to move the grinder-holders first in one direction and then in the other, and as it is necessary that they should be held rigidly, so as to properly sharpen the cutter, the devices R are necessary. The rod I is held rigidly in its bearings or support by suitable set-screws S, as shown.

By means of the constructionhere shown and described, it is only necessary to clamp this grinding-machine to two of the fingers of the finger-bar and then reciprocate the cutter and the cutter will be sharpened without the necessity of removing it from the machine.

No skill Whatever is necessary, and hence this machine can be operated by the ordinary farm hands, thus effecting a great saving in time, labor, and expense of sharpening the cutters of reaping, mowing, and binding machines.

Having thus described my invention, 1 elaim 1. In a grinder for mowing-machines, the combination of end pieces having clamps at their inner ends for attachment to the fingerbars and thei r outer ends extending upward, a rod which secures the end pieces together, and grinder holders pivoted upon the rod and ex tending inward over the knives, substantially as specified.

2. In a mouing-machine knife-grinder, the combination of. the L-shaped end pieces having a clamp at their lower ends to receive the fin ger-bars and outward] y-proj ectin g arms at their upper ends, a rod secured to the upper ends of the end pieces. grinder-holders pivotcd upon the rod and having their inner ends extending over the knives, a rod secured to the outwardly-projecting arms, and holdsecured to the said rod and having their inner ends engaging the pivoted ends of the grinder-holders for preventing them from having any lateral movement, substantially as set forth.

3. In a mowing-machine lniiife'grinder, the coi'nbination of the end pieces adapted to be secured to the finger-bars, the two parallel rods secured to their upper ends, the grinderholders pivoted between their ends upon the inner rod, and holding devices which are secured upon the outer rod and engaging the outer ends of the gririder-holders, for the purpose described.

In testimony whereof I al'lix my signature in presence of two witnesses.

EDBIUNI) J. Met.) UAII).

Witnesses: 

